To experience the size and beauty and sounds of this largest animal to have ever lived on the planet, just click on the awesome interactive banner of a blue whale at the end of this post (published by the World Dolphin and Cetacea Conservation Society).
Blue whales may be returning to pre-whaling feeding grounds. Scientists have documented the first known migration of blue whales from the coast of California to areas off British Columbia and the Gulf of Alaska since the end of commercial whaling in 1965.
Blue whales have recorded to reach weights of 150 to 170 tons and 88 ft 6 inches in length. By comparison, the largest known dinosaur was the Argentinosaurus of the Mesozoic Era, which is estimated to have weighed up to 90 tons.